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author | Felix Fietkau <nbd@openwrt.org> | 2010-06-26 20:42:58 +0000 |
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committer | Felix Fietkau <nbd@openwrt.org> | 2010-06-26 20:42:58 +0000 |
commit | da1bb88a2b900f0392b731ec47c5e1bff956fd8f (patch) | |
tree | 597146471e3eeafb4ba55e802e80b896770808ff /target/linux/generic/patches-2.6.33/001-squashfs_move_zlib_decomp.patch | |
parent | 6117c04c9416b295347fb45c37e430f01df1d0d9 (diff) | |
download | master-31e0f0ae-da1bb88a2b900f0392b731ec47c5e1bff956fd8f.tar.gz master-31e0f0ae-da1bb88a2b900f0392b731ec47c5e1bff956fd8f.tar.bz2 master-31e0f0ae-da1bb88a2b900f0392b731ec47c5e1bff956fd8f.zip |
rename target/linux/generic-2.6 to generic
SVN-Revision: 21952
Diffstat (limited to 'target/linux/generic/patches-2.6.33/001-squashfs_move_zlib_decomp.patch')
-rw-r--r-- | target/linux/generic/patches-2.6.33/001-squashfs_move_zlib_decomp.patch | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/target/linux/generic/patches-2.6.33/001-squashfs_move_zlib_decomp.patch b/target/linux/generic/patches-2.6.33/001-squashfs_move_zlib_decomp.patch new file mode 100644 index 0000000000..94096791f1 --- /dev/null +++ b/target/linux/generic/patches-2.6.33/001-squashfs_move_zlib_decomp.patch @@ -0,0 +1,244 @@ +From 6c4419d997d4431bb62e73475cd6b084e83efbd1 Mon Sep 17 00:00:00 2001 +From: Phillip Lougher <phillip@lougher.demon.co.uk> +Date: Tue, 22 Sep 2009 19:25:24 +0100 +Subject: [PATCH] Squashfs: move zlib decompression wrapper code into a separate file + +Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk> +--- + fs/squashfs/Makefile | 2 +- + fs/squashfs/block.c | 74 ++---------------------------- + fs/squashfs/squashfs.h | 4 ++ + fs/squashfs/zlib_wrapper.c | 109 ++++++++++++++++++++++++++++++++++++++++++++ + 4 files changed, 118 insertions(+), 71 deletions(-) + create mode 100644 fs/squashfs/zlib_wrapper.c + +--- a/fs/squashfs/Makefile ++++ b/fs/squashfs/Makefile +@@ -4,4 +4,4 @@ + + obj-$(CONFIG_SQUASHFS) += squashfs.o + squashfs-y += block.o cache.o dir.o export.o file.o fragment.o id.o inode.o +-squashfs-y += namei.o super.o symlink.o ++squashfs-y += namei.o super.o symlink.o zlib_wrapper.o +--- a/fs/squashfs/block.c ++++ b/fs/squashfs/block.c +@@ -29,7 +29,6 @@ + #include <linux/fs.h> + #include <linux/vfs.h> + #include <linux/slab.h> +-#include <linux/mutex.h> + #include <linux/string.h> + #include <linux/buffer_head.h> + #include <linux/zlib.h> +@@ -153,72 +152,10 @@ int squashfs_read_data(struct super_bloc + } + + if (compressed) { +- int zlib_err = 0, zlib_init = 0; +- +- /* +- * Uncompress block. +- */ +- +- mutex_lock(&msblk->read_data_mutex); +- +- msblk->stream.avail_out = 0; +- msblk->stream.avail_in = 0; +- +- bytes = length; +- do { +- if (msblk->stream.avail_in == 0 && k < b) { +- avail = min(bytes, msblk->devblksize - offset); +- bytes -= avail; +- wait_on_buffer(bh[k]); +- if (!buffer_uptodate(bh[k])) +- goto release_mutex; +- +- if (avail == 0) { +- offset = 0; +- put_bh(bh[k++]); +- continue; +- } +- +- msblk->stream.next_in = bh[k]->b_data + offset; +- msblk->stream.avail_in = avail; +- offset = 0; +- } +- +- if (msblk->stream.avail_out == 0 && page < pages) { +- msblk->stream.next_out = buffer[page++]; +- msblk->stream.avail_out = PAGE_CACHE_SIZE; +- } +- +- if (!zlib_init) { +- zlib_err = zlib_inflateInit(&msblk->stream); +- if (zlib_err != Z_OK) { +- ERROR("zlib_inflateInit returned" +- " unexpected result 0x%x," +- " srclength %d\n", zlib_err, +- srclength); +- goto release_mutex; +- } +- zlib_init = 1; +- } +- +- zlib_err = zlib_inflate(&msblk->stream, Z_SYNC_FLUSH); +- +- if (msblk->stream.avail_in == 0 && k < b) +- put_bh(bh[k++]); +- } while (zlib_err == Z_OK); +- +- if (zlib_err != Z_STREAM_END) { +- ERROR("zlib_inflate error, data probably corrupt\n"); +- goto release_mutex; +- } +- +- zlib_err = zlib_inflateEnd(&msblk->stream); +- if (zlib_err != Z_OK) { +- ERROR("zlib_inflate error, data probably corrupt\n"); +- goto release_mutex; +- } +- length = msblk->stream.total_out; +- mutex_unlock(&msblk->read_data_mutex); ++ length = zlib_uncompress(msblk, buffer, bh, b, offset, length, ++ srclength, pages); ++ if (length < 0) ++ goto read_failure; + } else { + /* + * Block is uncompressed. +@@ -255,9 +192,6 @@ int squashfs_read_data(struct super_bloc + kfree(bh); + return length; + +-release_mutex: +- mutex_unlock(&msblk->read_data_mutex); +- + block_release: + for (; k < b; k++) + put_bh(bh[k]); +--- a/fs/squashfs/squashfs.h ++++ b/fs/squashfs/squashfs.h +@@ -70,6 +70,10 @@ extern struct inode *squashfs_iget(struc + unsigned int); + extern int squashfs_read_inode(struct inode *, long long); + ++/* zlib_wrapper.c */ ++extern int zlib_uncompress(struct squashfs_sb_info *, void **, ++ struct buffer_head **, int, int, int, int, int); ++ + /* + * Inodes and files operations + */ +--- /dev/null ++++ b/fs/squashfs/zlib_wrapper.c +@@ -0,0 +1,109 @@ ++/* ++ * Squashfs - a compressed read only filesystem for Linux ++ * ++ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 ++ * Phillip Lougher <phillip@lougher.demon.co.uk> ++ * ++ * This program is free software; you can redistribute it and/or ++ * modify it under the terms of the GNU General Public License ++ * as published by the Free Software Foundation; either version 2, ++ * or (at your option) any later version. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. ++ * ++ * zlib_wrapper.c ++ */ ++ ++ ++#include <linux/mutex.h> ++#include <linux/buffer_head.h> ++#include <linux/zlib.h> ++ ++#include "squashfs_fs.h" ++#include "squashfs_fs_sb.h" ++#include "squashfs_fs_i.h" ++#include "squashfs.h" ++ ++int zlib_uncompress(struct squashfs_sb_info *msblk, void **buffer, ++ struct buffer_head **bh, int b, int offset, int length, int srclength, ++ int pages) ++{ ++ int zlib_err = 0, zlib_init = 0; ++ int avail, bytes, k = 0, page = 0; ++ ++ mutex_lock(&msblk->read_data_mutex); ++ ++ msblk->stream.avail_out = 0; ++ msblk->stream.avail_in = 0; ++ ++ bytes = length; ++ do { ++ if (msblk->stream.avail_in == 0 && k < b) { ++ avail = min(bytes, msblk->devblksize - offset); ++ bytes -= avail; ++ wait_on_buffer(bh[k]); ++ if (!buffer_uptodate(bh[k])) ++ goto release_mutex; ++ ++ if (avail == 0) { ++ offset = 0; ++ put_bh(bh[k++]); ++ continue; ++ } ++ ++ msblk->stream.next_in = bh[k]->b_data + offset; ++ msblk->stream.avail_in = avail; ++ offset = 0; ++ } ++ ++ if (msblk->stream.avail_out == 0 && page < pages) { ++ msblk->stream.next_out = buffer[page++]; ++ msblk->stream.avail_out = PAGE_CACHE_SIZE; ++ } ++ ++ if (!zlib_init) { ++ zlib_err = zlib_inflateInit(&msblk->stream); ++ if (zlib_err != Z_OK) { ++ ERROR("zlib_inflateInit returned unexpected " ++ "result 0x%x, srclength %d\n", ++ zlib_err, srclength); ++ goto release_mutex; ++ } ++ zlib_init = 1; ++ } ++ ++ zlib_err = zlib_inflate(&msblk->stream, Z_SYNC_FLUSH); ++ ++ if (msblk->stream.avail_in == 0 && k < b) ++ put_bh(bh[k++]); ++ } while (zlib_err == Z_OK); ++ ++ if (zlib_err != Z_STREAM_END) { ++ ERROR("zlib_inflate error, data probably corrupt\n"); ++ goto release_mutex; ++ } ++ ++ zlib_err = zlib_inflateEnd(&msblk->stream); ++ if (zlib_err != Z_OK) { ++ ERROR("zlib_inflate error, data probably corrupt\n"); ++ goto release_mutex; ++ } ++ ++ mutex_unlock(&msblk->read_data_mutex); ++ return msblk->stream.total_out; ++ ++release_mutex: ++ mutex_unlock(&msblk->read_data_mutex); ++ ++ for (; k < b; k++) ++ put_bh(bh[k]); ++ ++ return -EIO; ++} |